Cynics will claim that Anna Murdoch's first novel, which bears the dedication "For K.R.M.," was helped into print by the name hiding behind those initials. The fledgling author's husband happens to be Keith Rupert Murdoch, the Australian-born press baron whose empire now includes a movie studio and may soon ex tend to a string of independent TV stations in the U.S. But the cynics in this case will be wrong. In Her Own Image would have found a willing publisher if it had been written by someone without an influential...